Isaac Newton's Principia Mathematica

Isaac Newton's Principia Mathematica, published in 1687, is a foundational work in physics that formulates the laws of motion and universal gravitation. It explains how objects move both on Earth and in space, showing that the same natural laws apply everywhere. Newton introduced concepts like inertia, acceleration, and action-reaction, and demonstrated that gravity is a force acting between masses. This work unified celestial and terrestrial physics, revolutionizing understanding of the universe and laying the groundwork for modern physics.